//
// DOMImplementation.h
//
// Library: XML
// Package: DOM
// Module:  DOM
//
// Definition of the DOM DOMImplementation class.
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier:	BSL-1.0
//


#ifndef DOM_DOMImplementation_INCLUDED
#define DOM_DOMImplementation_INCLUDED


#include "Poco/XML/XML.h"
#include "Poco/XML/XMLString.h"


namespace Poco
{
namespace XML
{


    class DocumentType;
    class Document;
    class NamePool;


    class XML_API DOMImplementation
    /// The DOMImplementation interface provides a number of methods for
    /// performing operations that are independent of any particular instance
    /// of the document object model.
    /// In this implementation, DOMImplementation is implemented as a singleton.
    {
    public:
        DOMImplementation();
        /// Creates the DOMImplementation.

        ~DOMImplementation();
        /// Destroys the DOMImplementation.

        bool hasFeature(const XMLString & feature, const XMLString & version) const;
        /// Tests if the DOM implementation implements a specific feature.
        ///
        /// The only supported features are "XML", version "1.0" and "Core",
        /// "Events", "MutationEvents" and "Traversal", version "2.0".

        // DOM Level 2
        DocumentType * createDocumentType(const XMLString & name, const XMLString & publicId, const XMLString & systemId) const;
        /// Creates an empty DocumentType node. Entity declarations and notations
        /// are not made available. Entity reference expansions and default attribute
        /// additions do not occur.

        Document * createDocument(const XMLString & namespaceURI, const XMLString & qualifiedName, DocumentType * doctype) const;
        /// Creates an XML Document object of the specified type with its document element.
        ///
        /// Note: You can also create a Document directly using the new operator.

        static const DOMImplementation & instance();
        /// Returns a reference to the default DOMImplementation
        /// object.

    private:
        static const XMLString FEATURE_XML;
        static const XMLString FEATURE_CORE;
        static const XMLString FEATURE_EVENTS;
        static const XMLString FEATURE_MUTATIONEVENTS;
        static const XMLString FEATURE_TRAVERSAL;
        static const XMLString VERSION_1_0;
        static const XMLString VERSION_2_0;
    };


}
} // namespace Poco::XML


#endif // DOM_DOMImplementation_INCLUDED
